Debris and Drainage Conditions That Affect Runoff
Drainage performance depends heavily on the specific surroundings of each property. Accumulations that slow down or obstruct water movement typically involve several common materials:
- Dry leaves, twigs, and broken plant matter that collect along low-slope roof valleys.
- Windblown dust, organic grit, and loose dirt that settle into stagnant trough pools.
- Pine needles or seed pods that wedge tightly across downspout openings.
- Pockets of decomposed silt that prevent complete drainage after rain or snowmelt.